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Showing 1 to 18 of 18 for “"Dielectric Elastomers"”.
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Dielectric elastomers for space robotics applications
… soft, a robot must be powered by soft actuators. Dielectric elastomer transducers (DETs) made from carbon-silicone composites offer many advantages as artificial muscles; they are lightweight, have a high work density, and are capable of artificial proprioception. Taking inspiration from nature, …
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On Designing Compliant Actuators Based On Dielectric Elastomers
Dielectric Elastomers (DE) are incompressible dielectrics which can experience deviatoric (isochoric) finite deformations in response to applied large electric fields. Thanks to the strong electro-mechanical coupling, DE intrinsically offer great potentialities for conceiving novel solid-state …
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Passive, Self-Healable, Dielectric Elastomers for Structural Health Monitoring
… and fabricate a self-healable, passive, dielectric elastomer impact sensor for structural health monitoring on inflatable space structures subject to impact by micrometeoroids and orbital debris. In a setting in which impact repairs can be extremely costly, the implementation of such a …
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DESIGN, MANUFACTURING, AND CHARACTERIZATION OF SOFT, CAPACITIVE ACTUATORS AND ARCHITECTED DIELECTRIC ELASTOMERS
Elastomeric, dielectric architectures exhibit versatile functionality. Depending on their material properties and geometric structure, dielectric architectures can facilitate the transformation of an object’s shape, sense local deformation, or even alter the transmission of electromagnetic waves in …
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Induced Damping And Its Relationship To Beneficial Energy Harvesting In Dielectric Elastomers With Application To Walking
… stress generations. One type of EAP, the dielectric elastomer (DE), which utilizes electrostatic forces built up across the dielectric polymer to convert between electrical and mechanical energy, is employed in this research. As with most EAPs, DE materials are highly nonlinear and require …
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Electroactive polymer actuators: theory and computations
… (IPMCs), (2) piezoelectric polymers, and (3) dielectric elastomers. Highly-coupled physical phenomena drive the actuation mechanism for each of these electroactive polymers. We present theory which accounts for electro-chemo-mechanical coupling in the case of ionic polymer-metal composites and …
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Optimisation of silicone-based dielectric elastomer transducers by means of block copolymers – synthesis and compounding
… soft and robust human muscle. In this regard, dielectric elastomers have been studied. Their actuation occurs when Maxwell stress exceeds elastic stress in the presence of an electrical field, resulting in contraction in thickness and planar expansion in the area. As well as an actuator, …
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Instability of Dielectric Elastomer Actuators
Dielectric elastomers (DEs) are an important class of materials, currently employed in the design and realization of electrically-driven, highly deformable actuators and devices, which find application in several fields of technology and engineering, including aerospace, biomedical and mechanical …
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3D PRINTING OF ELASTOMERS AND APPLICATIONS
… can be controlled. Here, functional elastomers have been developed and manufactured by 3D printing. Dielectric elastomers with ultra-high permittivity have been formulated, printed and characterised. Also, conducting elastomer with very low hysteresis and self healing abilities have …
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Design and testing of fiber-constrained electroactive polymer
… (EAP) such as electrostatically actuated dielectric elastomers (DE) are considered very suitable technologies for these applications. In particular, owing to their simplicity, high strain and energy densities, and low noise, DE’s are currently the most promising candidates for small scale …
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Dielectric elastomer composites: analytical and numerical non-convex homogenization methods and applications
… results that have recently identified dielectric elastomer composites as potential enablers of new technologies (essentially, as the next generation of soft sensors and actuators), this work puts forth analytical and numerical methods to determine the macroscopic elastic dielectric …
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Additively Manufactured Dielectric Elastomer Actuators: Development and Performance Enhancement
… structure. Among the utilized materials, dielectric elastomers (DEs) are intrinsically compliant, high energy density polymers with fast and reversible electromechanical response. Additionally, the electrically driven work principle allows DEs to be distributed in a desired fashion and …
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Designing Multiphase Step-Growth Polymers for Advanced Technologies: From Electromechanical Transducers to Additive Manufacturing
… their properties for applications including elastomers, electromechanical transducers, and additive manufacturing (AM). A review of recent literature revealed the material properties required for polymeric materials in electromechanical transducers, which aided in the design of polymers for …
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Dynamic Modeling of Soft Robotic Dielectric Elastomer Actuator
<p>Dielectric elastomers actuators (DEAs) are among the preferred materials for developing lightweight, high compliance and energy efficient driven mechanisms for soft robots. Simple DEAs consist mostly of a homogeneous elastomeric materials that transduce electrical energy into mechanical …
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Nonlinear Electromechanical Deformation of Isotropic and Anisotropic Electro-Elastic Materials
… sensing response of isotropic and anisotropic dielectric elastomers (DEs) subject to combined mechanical and electrical loads. The numerical response is compared with experimental results to validate the theoretical model. For the constitutive formulation of the electro-elastic materials, …
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Time-dependent dielectric response of polymer nanoparticulate composites containing rapidly oscillating source terms
… for the macroscopic response of time-dependent dielectric composites that contain space charges varying spatially at the length scale of the microstructure and that are subjected to alternating electric fields. The focus is on dielectrics with periodic microstructures and two fairly general …
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Electromechanical Characterization of the Static and Dynamic Response of Dielectric Elastomer Membranes
Dielectric elastomers (DEs) are a relatively new electroactive polymer (EAP) transducer technology. They are capable of over 100% strain when actuated, and can be used as sensors to measure large strains. In actuation mode, the DE is subject to an electric field; in sensing mode, the capacitance of …
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Soft nanocomposites with enhanced electromechanical response for dielectric elastomer actuators
… electrical and mechanical properties, by use of dielectric spectroscopy, tensile mechanical analysis, and electric breakdown tests. First, nanocomposites consisting of high permittivity rutile TiO2 nanoparticles dispersed in thermoplastic block copolymer SEBS …